Saw-filing machine



W. DIEGEL.

SAW FILING'MACHINE. Y APPLICATION FILED JAN. 16, 19 20. 4

Patented May 24, 1921.

5 SHETSSHEET 2.

\ m% H a W km 4 m Q on x Q X m W W DIEGEL.

SAW FILING MACHINE. APPLICAHON FILED JAN. 16. 1920.-

Patented May24,1923..,

5SHEETS-SHEET 3- W. DIESEL. SAW HUNG MABHINE.

APPLICATION FILED IAN- ifi, 1920.

5 SHEETS-SHEET W, DlEGE-L.

SAW FILING MACHINE.

APPLICATION FILED JAN. 16, 1920.

1 ,3'79,252. Patented May 24, 1921.

5 SHEETS-SHEET 5.

WILLIAM DIEGEL, OLE MANITOWOG, WISCONSIN.

SAW-FILING MACHINE.

Specification of Letters Patent.

Patented May 24:, 1921.

Application filed January 16, 1320. $eria1 No. 351,965.

To all whom it may concern:

Be it known that I, WVILLIAM Dmenn, a citizen of the United States, and a resident of Manitowoc, in the county of Manitowoc and State of Wisconsin, have invented a certain new and useful Improvement in Saw-Filing Machines, of which the following is a specification.

This invention relates to saw filing machines.

The object of the invention is to provide a new and improved machine for filing saws which shall be simple in construction, strong and durable and which is adapted for a wide range of application and use for filing saws of different kinds, as hand saws, band saws, circular saws and the like.

To accomplish the foregoing object, a saw filing machine of my invention comprises the various features, combinations of features and details of construction hereinafter described and claimed.

In the accompanying drawings, in which my invention is fully illustrated,

Figure 1 is a side View of a filing machine of my invention taken from the left side of Fig. 2.

Fig. 2 is a top plan view thereof.

Fig. 3 is a sectional elevation on the line 8-3 of Fig. 1.

Fig. i is an elevation of the opposite side of the saw-supporting means from that shown in Fig. 3.

Fig. 5 is a sectional view of the saw-supporting means on the line 55 of Fig. l.

Fig. 6 is an enlarged fragmentary detail view of the means for actuating the levers which carry the feed pawls.

Figs. 7, 8 and 9 are diagrammatic views illustrating the setting of the eccentric and crank for operating the file and feeding the saw, respectively.

Fig. 10 is a detached front view of an attachment used for filing circular saws.

Fig. 11 is a sectional view on the line 11 11 of Fig. 10.

Fig. 12 is a detached front view of an attachment for filing band saws.

Fig. 18 is an end View thereof from the position 13l3 of Fig. 12.

Fig. 1a is a side view of one of the pulleys for supporting said band saw at points remote from the machine, showing the manner of adjustably supporting the same.

The operative parts of my machine are mounted upon a suitable frame. As regards details, either of structure or mate rials, the construction of the frame of the machine is immaterial, it being possible for a mechanic of ordinary skill to devise a frame suitable for the purpose.

A desirable form of frame, shown in the drawings, comprises'side frames consisting of upright corner members 1, which are rigidly connected by longitudinal frame members 2. Secured to the front ends of said side frame members and rigidly con necting the same is aplate 3. At their rear ends, said side frames are connected by bars 4.

During the operation of the machine, the saw to be filed, shown in the drawings as a hand saw, indicated at 5, is supported in a suitable carriage designated as a whole A, which comprises jaws 6, between which the saw 5 is adapted to be clamped with its teeth projecting above said jaws. In the preferable construction shown, the clamping jaws 6 consist of metal bars 7 faced with wood strips 8, and are held yieldingly together in clamping position by springs applied thereto, consisting, as shown, of Llshaped springs 9, to the upper ends of which said clamping jaws are rigidly secured.

The position of the saw 5 in the clamping jaws 6 is defined by a supporting bar 10 provided with a groove in its top edge adapted to receive the rear edge of the saw 5. To provide for raising and lowering the saw 5 so that the teeth thereof will project a greater or less distance above the clamping jaws 6, as may be desired, the bar 10 is supported so that it can be raised and lowered, and to adjust said supporting bar 10 to the inclination of the back of the saw relatively to the front edge thereof, said supporting bar 10 is pivotally supported.

In the preferable construction shown, said supporting bar 10 is mounted on a downward projection 11 on one of the jaws 6, being connected thereto by means of a screw stud 12 which extends through a slot 13 formed in said downward projection 11 and is threaded into said supporting bar 10, the relation'being such that when said screw 12 is loosened, said supporting bar may be turned pivotally and also raised and lowered, and when said screw is tightened, it will clamp said supporting bar in any desired adjusted position to said projection 11.

To provide for conveniently inserting a saw 5 between the clamping jaws 6 andfor removing it therefrom, said jaws are adapt ed to be opened against the force of the springs 9 applied thereto for closing the same, by suitable mechanical means. Simple means for this purpose consists of bars 14 one pivoted to an arm of each spring 9, said. bars being sufficiently longer than the transverse distance between the arms of said springs, respectively, at the points at which they are pivoted, so that when turned to bring the same into endwise position between the arms of said springs 9, they will operate to spread the free ends of. said springs and thus of the jaws 6 a desired distance apart. 'Said bars 1% are adapted to be maintained in position corresponding to open position of the jaws 6 by suitable means, consisting, as shown, of stops 15 on the arms or members of said springs other than those to which said bars are pivoted, the position of said stops being preferably such that they will permit pivotal movement of said bars slightly beyond their dead points.

in use, the saw carriage A is slidably mounted on a frame designated as a whole B, comprising rails '16 and 17 which are rigidly connected in spaced relation with their remote upper and lower ed es parallel, by cross bars, said bars preferably comprising bars 18 disposed substantially at right anglesto said rails 16 and 17 and. diagonal bars 19, thusforming a very stron stiff and rigid structure.

' The saw carriage Ais provided with suitable bearings adapted to slidably engage the rails 16 and 17 of the supporting frame 13, said slide bearings consisting, as shown, of hooks on said saw carriage adapted to slidably engage the edges of the rails 16 and 17. 'As shown, said hooks comprise bearing hooks 20 at the upper edges of the metal bars 7 of the clamping jaws 6 and other hooks 21 at the lower ends of downward projections 22 on. said bars 7, the

lower ends of said downward projections 22 being connected by longitudinal bars 23. As shown, the bearing hooks 20 comprise hooks positioned adjacent to the ends of the aw bars 6 and an intermediate substantially central hook, whilethe hooks 21 comprise hooks positioned adjacent to the ends of the carriage only.

As shown, also, the bearing hooks 20 and 21 and adjunctive parts are in duplicate on opposite sides of the saw carriage A, thus providing for reversing the position of the saw carriage A and thus of the saw 5 in the machine, that is, turning it end for end to provide for filing the teeth on a bevel, as presently described. 7

As shown, the frame 3 is supported at the front side of the machine, being preferably mounted on the plate 3 in such manner as to be pivotally movable about an upright axis. As shown, the means for thus pivotally sup porting said frame consists of a pivot pin 24 which extends through holes or bearings formed in brackets 25 and 26 on said plate 3 and on the inner rails 16 and 17 of said supporting frame B, said brackets being arranged in vertically spaced relation with the brackets 26 on said supporting frame resting upon the brackets 25 secured to said plate 3. v

Said supporting frame B and thus the saw carriage A are adapted to be secured in any pivotal adjustment corresponding to a desired angle or bevel at which the teeth of the saw are to be filed, by means of clamping screws 27 which extend through slots 28 formed in brackets-29 on said supporting frame B, concentric with the pivotal axis of said frame, and which are threaded into lugs or brackets 30 on the front upright corner frame members 1.

The file 31 used for filing the saw 5 shown as an ordinary three-cornered fileis supported and operated in the following manner z-Said file 31 is supported in a bowed frame 32 resembling in a general way the frame of a hack saw. end of said frame is a boss 33 formed through which is a screwsthreaded hole to which is fitted a scr w stud 34 formed in the inner end of whiehis a socket 35, shaped to conform, to the outer end of'the file 31-in the present instance a triangular shaped soc ret. Engagement of the end of said file with the socket said screw stud 34' will hold the file from turning, thus providing for securing said file 31 in any desired axial adjustment to conform to the shape of the teeth of the saw to be filed, by turning said screw stud 34: and securing it in desired adj usted position. For convenience in turning said screw stud, the outer end thereof is squared to receive a wrench. and said screw stud is adapted to be secured in position corresponding to any desired axial adjustment of the file 31 by means of a lock nut 36 threaded to the outer end thereof and adapted to bear against the face of the boss 33.

The end of the tang of the file engages a socket 37 formed in a head 38 on the inner end of a shank 39 secured in screw-threaded engagement with a hole formed through the saw frame in alinement with the screw' stud 34. To provide for using saws of dif- At the outer ferent lengths in the frame 32, the shank 39 is made of considerable length, say one and one-half inches, whereby the head 38 thereon may be adjusted toward and from the screw stud 34: as it is desired to use a longer or shorter file.

The file frame 32 is secured to a plate 40, the edges of which are slidably fitted to dove-tailed guides or grooves it formed in a bed plate 42 so as to be endwise movable therein. Said bed plate is rigidly secured to the outer ends of arms 43, the rear ends of which are pivoted upon a shaft 44 mounted to rotate freely in bearings on the machine frame. As shown, the bearings for said shaft are formed in bearing blocks 15 secured to the upper ends of the rear framr members 1.

Reciprocating endwise movement is ada pt ed to be imparted to the slide plate to and through it to the file frame 32 and file 31 secured therein, by means of an eccentric 4 on the shaft 44lfitted to which is an eccen trio strap 47 which is connected to the slide 40 by means of a connecting rod d8, the rear end of which is rigidly connected to said eccentric strap and the front end of which is pivotally connected to the rear end of said slide plate 40.

With the described construction, it i obvious that during the tiling stroke of the machine, the file 31 will sustain the weight of the arms l3 and of all parts carried thereby, including the file frame 8:2, the slide plate 40, and the bed plate 42. The weight of said parts will ordinarily exert sufiicient pressure on the file 31 to cause it to cut effectively, but, if desired, as in the case of large, coarse files, this pressure may be increased by additional weights applied thereto.

The operative position of the saw 31 is defined by a suitable stop which limits the downward movement of the bed plate e2. As shown, said stop consists of a rod or post d9 secured in the machine beneath said bed plate, contact with the upper end of which defines the extreme lowermost position of said bed plate. To provide for varying the operative length of said rod or post, a head or button 50 is threaded to the upper end thereof, on which. said bed plate 42 will bear directly, and which may be adjusted up or down to increase or decrease the length of said rod or post, by turning it in one direction or the other, the case may be. [-lSO, to deaden the noise and jar which would otherwise be produced by dropping or lowering said bed plate 42 too suddenly into contact with the head or button 50, a rubber pad or cushion 51 is preferably secured to the top of said head or button.

The bed plate l2 will be in its extreme depressed position when fully retracted, in

which position the small front end of'the file 81 will be directly over the saw 5, the relation and adjustment of parts being such that in this position the bed plate 42 will rest upon the pad or cushion 51 on the rod or post t and the file 31 will just clear the saw. The relation is such also, that, as said file is advanced, it will almost at once engage said saw and by contact therewith will raise the bed plate 42 out of contact with the stop formed by said pad or cushion 51, thus subjecting said file to the weight of said bed plate and associated parts.

As shown, also, the outer ends of he arms l3 together with the pa carried thereby, are supported against lateral di )lacement by means of a rod rigidly sect rod in the machine frame against which the outer edge of one of the arms 43 rests.

On the back or idle stroke of the file 31, it is adapted to be raised clear of the teeth of the saw being filed, in the following manner: Secured to the connecting rod do is an arm 53 rotatably mounted at the outer end of which is a. roller 55-, which, as shown, is adapted to ride upon and along cam plate 55 secured on the frame of the machine, on the back stroke of the file, when the shaft 44 and eccentric 4-6 are turned in the direction indicated by the arrow, F l, the relation being such that as soon as the eccentric passes the dead point, the forward limit of its throw, and begins to de scribe the upper arc of its path of travel, said roller 54 will be brought into engage ment with the cam plate 55 adjacent to its front end by the inclination of the connecting rod 48 to which the arm 53 is secured, which will operate, in an obvious manner, to depress the outer end of said arm, and the relationbeing such also that contact of said roller with said cam plate will operate through the rigid arms as to raise the free ends of said arms together with the various parts carried thereby, including the file frame 32 and the file 31 secured therein, a sufficient distance so that the file 31 will clear the teeth of the saw, and the cam plate 55 being so shaped that the file 31 will be supported in such raised position during its entire return stroke. As soon as the eccentric passes the rear limit of its throw, the direction of inclination of the connecting rod d8 will be reversed, which will operate, in an obvious manner, to raise the roller 5% mounted in the arm 53 clear of the cam plate 55, thus permitting the file 31 to come into contact with the teeth of the saw 5.

As shown, the cam plate is mounted on a saddle block 56 secured to a horizontal plate 57 secured to the longitudinal frame members 2.

In the operation of the machine, a step ported therein by a suitable feed mechanism, the relationbeing such that the saw will be fed a distance equal to the distance between adjacent teeth of the saw at each stroke of the file 81.

In what I now consider to be the preferable means for this purpose, said feed mechanism comprises upright levers 59 and 60, of which'the lever 59 is pivoted to a bracket 61 011 the front plate 3 of the machine and the lever is pivoted directly to said plate, the lever 60 being st aight and the lever 59 being offset frontward above its pivot point, as shown at 62, to bring the upper end of said lever in alinement with the upper end of the lever 60. A link 63 pivotally connects the lever 59 at a point above its pivot, with the lever 60 at a point below its pivot, the relation being such that oscillatory movement in different directions and through the same are will be imparted simultaneously to said levers 59 and 60. Pivoted to the upper ends of said levers 69 and 60, respectively, are pawls 64: and 65 formed at the free ends of which are laterally projecting fingers 66 and 67' which are adapted to engage the teeth of the saw Said saw will thus form in effect a ratchet bar, by which it together with the saw carriage will be fed along the saw carriage supporting frame B by the pawls (id and 65 when oscillatory movement is imparted to the levers 59 and 60.

The feed pawls 6d and 65 are adapted for feeding the saw in opposite directions, and only one thereof will be used at a given time. WVhen not in use, said pawls will preferably be turned back into the position occupied by the pawl 65, Fig. 3, in which position it will be maintained by means of a suitable stop consisting, as shown, of a projection 68 thereon which projects laterally therefrom intoposition to contact with the edge of the lever 59 or 60 to which said pawl is pivoted, when said pawls, respectively, are turned into inoperative position. Oscillation is adapted to be imparted to the levers 59 and 60 by means of connection with the shaft l l. As shown, said connection comprises a plate 69 slidably fitted to guides or ways 70 formed on the horizontal plate 57, which is connected by means of a connecting rod 71 with the crank pin 72 of a crank 73 secured to the end of the shaft 44. As shown, the front end of said 0011- justed position by set screws or other suitable means. By adjusting the crank pin 72,

60, as shown the lever 59, engages slots 75 and 76, of which'the slot 75'is formed in the fixed plate 57 and extends at right angles to the direction of movement of the slide plate 69, while the slot 7 6 is formed in said slide plate 69 and extends diagonally to the direction of movement thereof, the relation being such that forward movement of the slide plate 69 will impart oscillation to said lever in a direction to advance the pawl 64 thereon and through the link 63 will impart oscillation to the lever 60 in a direction to retract the pawl 65 pivoted thereto.

In view of the fact that the saw 5 is fed with an intermittent step by step movement equal to the pitch of the teeth of the saw, that is, the distance between adjacent teeth, said saw remaining stationary during the forward or operative movement of the file, it is obvious that advancement of the pawls 64k and 65 to effect feeding of the saw will necessarily take place for the'most part, during the backward movement of the file. Also, in view of the fact that said saw is advanced or fed intermittently while the crank 73, which actuates the pawls 64 and 65, rotates continuously, it is obvious that provision must be made for sufficient overtravel of said pawls to permit the saw to remain stationary during the forward or cutting stroke of the file.

In accordance with my present invention, the foregoing ends may be attained in the following manner and with the following rela tive adjustments of the crank 7 3 and eccene trio 46 and with a crank throw correspond ing to a feeding movement of the pawls equal to one and one-quarter times the pitch of he saw teeth, reference being had to Figs. 7, 8 and 9 of the drawings, showing enlarged diagrammatic views of said eccentric and crank and also a section of the toothed edge of the saw To avoid confusion, the following descrip- 7 tion will be in the singular with particular reference to the movement of the pawl 64. it will. be understood, however, that the description will apply equally to the pawl 65, but with the qualification and understanding that the movement of the pawl 65 will be the reverse of the pawl 64:.

Assuming that the eccentric 46 is in p0sition corresponding to the beginning of the forward or cutting stroke of the file, the crank 73 will be secured in such relative position on the shaft 44 that the crank pin 72 will be in the position m (Fig. 8) in which position the feeding pawl 64c will have finished its feeding movement and will have been retracted a distance corresponding to an angular travel of the crank 73 through approximately 60 degrees f om its dead point, which represents retraction of said pawl a distance substantially equal to one-quarter r its rearward stroke, the position of said feeding pawl relative to the tooth of the saw in position for engagement by the file on forward movement, bein indicated by its the letter i (Fig. 9).

With the crank 73, the saw 5 and the feeding pawl 6% in the relative positions indicated and the file just beginning its forward or cutting stroke, during the time that the major diameter of the eccentric 46 is describing an arc of 60 degrees, from the position to the position a (Fig. 7), the crank pin 73 will move through an arc of 60 degrees to the position :0, which will retract said feeding pawl from the position 7 to the position 3 in which position it will enthe tooth of the saw next in the rear of the tooth upon which the file is about to operate, the retraction of said pawl during this are of travel being relatively fast so that it will be retracted rapidly out of the way of the file which is advancing with a relatively very slow initial movement. In like manner, as the major diameter of the eccentric travels through the next succeec: ing arc 60 degrees from the position e" to the position 2 the crank pin '72 will move through a similar are from the position so to the position 00 and the pawl 6 from the position 3 to the point 7/ of its extreme retraction.

Also, as the major axis of the eccentric moves through an arc of 60 degrees fromthe position 2 to 2 thus bringing the file to the end of its forward stroke,'the crank pin 72 i will likewise travel through an arc of 60 degross from the position x to and will advance the feeding pawl from the position 3 to the position 7 that is, into contact with the tooth next in the rear of that which has just been filed, so that further advancement of said pawl will effect feeding of the saw, @n the rearward stroke of the file from the position .2 to a, the crank pin 72 will travel through an arc of 180 degrees from the position to m, which will, operate to advance the feeding pawl and thus the saw tooth with which said pawl is in engagement from the position f to the position and to retract said pawl from the position 1 to the position a, corresponding to the position x of the crank pin 72.

To provide for conveniently adjusting the throw of the crank pin 72 and thus the travel of the pawl 64 to adapt the machine for filing saws the teeth of which are of different pitch, the crank 73 is preferably provided with a scale adjacent to the slide 74 in which the crank pin 72 is secured, indicated at 77, and the slide 74: is provided with an index 78 designed to be brought into register with the graduations of the scale 77 by adjustment of the slide 74:, the relation being such that register of said index 78 with the graduations of the scale 77, respectively, will bring the crank pin 72 into proper adjustment to feed the saw a distance coresponding to the pitch of the teeth thereof, the difierent graduations of the scale 77 being preferably marked with the pitch of the saw teeth, as with the numerals 5, 8, 10, 16, etc, said numerals indi cating that the saw has either 5, 8, 10 or 16 teeth to the inch, as the case may be.

With the construction described, it is obvious that the point of extreme advancement of the feeding pawls will vary slightly for different adjustments of the crank pin 72. But, owing to the manner of supporting the file, it is found in practice that there is sufficient play in its supporting connections to permit the file to adjust itself to the slightly different positions of the saw teeth corresponding to different adjustments of the crank pin.

When it is desired to file the teeth of the saw straight across, the carriage slide B will be adjusted so that the guide rails thereon will extend as nearly as may be, at right angles to the alinement of the file.

i lhen it is desired to file the saw on a bevel, said slide frame will be turned at a desired angle to the alineinent of the file, in the manner heretofore explained. In this case, also, adjacent teeth will be filed at opposite angles and to efiect this, the crank pin Y2 is set in such adjustment that for each reciprocation of the file, the saw will be fed a distance equal to the distance between a lternate teeth. After filing one set of teeth, the saw carriage will th n be removes from its slide frame and replaced thereon in reversed position, and the angular adjustment of said slide B changed position, the guide rails thereof will extend at an equal but opposite angle to the alinement of the file from its first adjustment. lhe pawl used for feeding the saw during the filing of the first set of teeth is then turned back into inoperative position, and. the opposite pawlwhich is adapted for feeding the saw in a direction opposite to that in which it will be fed by the first pawl, turned down into engagenent with the teeth of the saw, when the machine is set and ready for filing the second set of teeth.

My improved filing machine may be readily adapted for filing circular saws. To effect this, the saw carriage slide frame B is detached and a frame (1 is secured thereto,

changed so that in its said frame C carrying an arbor 79 on which a circular saw 80 (see Figs. 10 and 11) is adapted to be mounted.

In the preferable construction shown, the frame C may be described as a compound slide frame, comprising separate parts, one adjustable vertically and the other horizontally, thus providing for bringing the saw 80 into proper relation to the file 31 and also providing for adjusting the arbor 79 vertically to provide for filingsaws of different diameters.

In the preferable construction shown, said frame C comprises a slide 81 provided with dove-tailed bearings 82 which are slidably fitted to corresponding bearings formed on guides or ways 83. Said slide 81 is adapted to be adj ustedvertically, either up or down, and supported in desired vertical adjustment by means of screw 84, which has screw threaded engagement with a hole in a bracket 85 on the front side of the plate 3, the end of which is rotatably secured against endwise movement in a hole or opening formed in a. lug 86 on the slide 81.

The arbor 79 is secured directly in a second slide 87 provided with dove-tailed bearings which slidably engage horizontal dovetailed bearings 89 on the vertical slide 81. Said slide 87 is adapted to be ad usted hemzontally and to be maintained in desired the saws with the arbor, whereby the diffen ent teeth will be ground uniformly, the means for mountings saw on said arbor79 are as follows :Secnred to the outer face of a the slide 87 substantially concentric with the axis of the arbor 79, is a cup the-outer =dge of which is finished so that the plane thereof will be substantially pcrpeirlicular to the arbor 79, said rim forming a seat for the saw to be filed. Surrounding the arbor 7 9. is a bushing 94 provided with an axial hole or openingadapted to receive the arbor 79 sothat said bushing will turn freely on said arbor. V

Said bushing is circular in cross-section and the surface thereof which engages the hole in the saw. 80 is outwardly tapered.

The inner end of said bushing is loosely fitted to the side of the cup 93 and inserted between the bottom of said cup and the inner side of said bushing and surrounding the arbor 79 as a guide, is a coiled spring 95 which will tend to force the bushing 94 outwardly.

The saw 80 is adapted to be secured upon to 14: of

the arbor 79 by means of a washer 96 inserted over the arbor 79 outside of the saw 80, and a nut 97 threaded to theend of the arbor 79, and adapted to bear against the outer side of the washer 96, the relation being such that by setting up said screw, the saw 80 may be clamped between its seat formed by the edge of the cup 98 and the washer 96. In order that the washer 96 shall not interfere with inserting the bushing 9 1 through the eye of a saw 80, said washer preferably comprises a central cupped portion adapted to receive the tapered portion of said bushing.

With the described construction, it is obvious that when saws having holes for the arbor 79 of different sizes are mounted on the arbor 79, the spring'95 will force the bushing 94; outwardly So that the tapered surface thereof will engage the sides of the eye formed in said saw to receive the arbor and will operate to center said saw upon the arbor. it it also obvious that by properly adjusting the tension of the nut 97 the saw may be clamped between its seat on the cup 93 and the washer 96 to provide any desired frictional resistance to rotation of said saw to permit rotation of said saw by means of the feeding pawls 64 and and to maintain said saw in operative position during the cutting stroke of the file.

In order to prevent rotation of the saw 80 by the feeding pawls 641 and 35 from turning the v asher 96, which would tend to turn the nut 97 either to tighten the same so as to clamp the saw 80 between its seat on the cup 93 and the washer 96 with such force as to prevent further rotationthereof and thus prevent the operation of the machine, or to unscrew said nut and thus destroy the operative. adjustment of said saw on its bor, means are preferably provided for securing the-washer 96 againstrotation. As shown, said means comprise an arm 98 on said washer formed in the outer end of which is a slot 99 adapted to be inserted over a lined stud 100 on the vertical slide 81, wh ich will operate, in an obvious manner, to prevent rotation of said washer. As shown, the slot 99 is made sufficiently long to provide for necessary horizontal movement of the horizontal slide. 87 to pTO'Vl-LlO for desired horizontal adjustment of the saw 80.

Myimproved saw tiling; machine may also be readily adapted for filing band saws by substituting for the saw carriage supporting frame B a suitable attachment for supporting a band saw.

Such an attachment is shown in Figs. 10

the drawings and will now be described.

Said band saw attachment comprises a frame designated as a whole D, comprising a horizontal bar 101 supported at the upper ends of upright bars 102,103, connected between their ends by a transverse bar 10 1. Said attachment D is adapted to be Secured to the front or face plate 3 of the machine by means of screws or bolts inserted through holes 105 and 106 formed in the lower ends of the upright members 102 and 103, and through a hole 107 formed in the transverse frame member 104, the relation being such that the top edgeof the bar 101-will be slightly below the bottoms of the teeth of the saw to be filed, a short section of which is shown at 108.

The back or lower edge of the saw 108 rests on a shoulder 100 formed on a bar 110 supported on the upright members 102 and 103 of the frame of the attachment D, said bar 110 being supported so as to be vertically adjustable to adapt the attachment for use in connection with saws of dilierent widths. As shown, said bar 110 is supported by means of studs 111 which extend through slots 112 formed in the upright members 102 and 103 01" said attachment, threaded to which are wing nuts 113 adapted to bear against the upright members 102 and 103 and the relation beinc such that tightening said screws will clamp said bar 110 to said bars 102 and 103. As shown, also, springs 1142 are applied to said bar 110 below the studs 111 and which are adapted to bear against rigid portions of the upright members 102 and 103, the relation being such that setting up or tightening the wing nuts 113 will draw the upright portion or the shoulder 110 yieldingly into engagement with the side of the saw opposite to that which rests against thebar 101.

At points remote from the filing machine, the band saw 108 is supported by means of idle pulleys 115 adjustably mounted on studs 116 mounted in suitable supports. Formed on the lower edges of the pulleys 115 are flanges 117 against which the back or lower edge of the band saw 108 rests as it passes around said pulleys, and which will operate, in an obvious manner, to support said saw in desired operative relation in the attachment D. Simple means for ad justably supporting the pulleys 115 adjusted position consist of collars 118 fitted to the studs 116 below the pulleys 115v and adapted to be secured in desired vertical adjustment thereon by means of set screws or other suitable means.

I. claim 1. In a saw filing machine, the combination of a frame comprising saw supporting means, lile supporting means comprising a slide, a base plate provided with hearings to which said slide is movably fitted, a shaft rotatably mounted in hearings on the machine frame, arms pivoted to said shaft to which said base plate is secured, connection between said shaft and file supporting slide adapted for imparting reciprocating move;

ment to said slide, means associated with said reciprocating means for imparting pivotal movement to the base plate suppor ing arms, constructed and arranged for liftsaid base plate on the back stroke of the file so that said lilo will clear the teeth of a saw supported in said machine and for releasing said base plate on the front stroke of the iile to permit lowering thereof to eilect engagement of the file carried thereby with the teeth of a saw being filed, and saw feeding means, substantially as described.

2. In a saw filing machine, the combination oi a frame comprising saw supporting means, file supporting means comprising a slide, base plate provided with hearings to which said slide is movably fitted, a shaft rotatably mounted in hearings on the machine frame, arms pivoted to said shaft to which said base plate is secured, connection between said shaft and file supporting slide adapted for imparting reciprocating movement to said slide, comprising an eccentric secured to said shaft, an eccentric strap adjusted thereto, a connecting red one end of which is connected to said eccentric strap and the opposite end of which is pivotally connected to said reciprocating slide, means associated with said connecting rod for imparting pivotal movement to the base plate supporting arms, constructed and arranged for lifting said base plate on the back stroke of the file so that said file will clear the teeth of a saw supported in said machine and for releasing said base plate on the front stroke of the to permit lowering thereof to eli'ect ens; gement 01" the file carried thereby with the teeth of a saw being filed, substantially as described.

8. In a saw filing machine, the combination oi" a frame comprising saw supporting means, file supporting means comprising a slide, a base plate provided with hearings to which said slide is movably fitted, a bearshai t rotatably mounted in suitable bearings on said machine frame, arms pivoted upon said shaft to which said base plate is scoured, operative connection between said shaft and the tile supporting slide for imparting reciprocating: movement to said slide, said connection comprising an ecoentrio secured to said shalt, an eccentric strap adjusted thereto, a connecting rod one end of which is rigidly connected to said eccentric strap and the opposite end of which is pivotally connected to said slide, means associated with said connecting; rod for imparting pivotal movement to the base plate supporting arms, constructed and arranged for lifting said base plate on the back stroke of the file so that said file will clear the teeth of a saw supported in said machine and for releasing said base plate on the front stroke of the file to permit lowering thereof to effect engagement of the file carried thereby with the teeth of a saw being filed, said means comprising a rigid arm secured to said connecting rod and a fixed cam plate, the relation being such that the outer end of saidarm will engage said cam plate on the return stroke of the file, and saw feeding means, substantially as. described.

4. In asaw filing machine, the combination of a frame comprising saw supporting means, file supporting means comprising a slide, a base plate provided with bearings to which said slide is movably fitted, means for movably supporting said base plate, means for imparting reciprocating movement to said slide, means for lifting said base plate on the back stroke of the file so that said file will clear the teeth of a saw supported in said machine, said lifting means being constructed and arranged to release said base plate on the front stroke of the file to permit lowering thereof to effect engagement of the file carried thereby with the teeth of a saw being filed, a stop which defines the lowermost position of said base plate, comprising a resilient cushionwith which said base plate contacts directly, and saw feeding means, substantially as described.

5. In a saw filing machine, the combination of a frame comprising saw supporting means, file supporting means comprising a slide, a base plate providedwith bearings to which said slide is movably fitted, a shaft rotatably mounted in suitable bearings on said machine frame, arms pivoted upon said shaft to which said base plate is secured, operative connection between said shaft and the file supporting slide for imparting re-- ciprocating movement to said slide, said connection comprising an eccentric secured to said shaft, an eccentric strap adjusted thereto, a connecting rod one end of which is rigidly connected to said eccentric strap and the opposite end of which is pivotally connected to said reciprocating slide, means associated with said connecting rod for im parting pivotal movement to the base plate supporting arms, constructed and arranged for lifting said base plate on the back stroke of the file so that said file will clear the teeth of a saw supported in said machine and for releasing said base plate on the front stroke of the file to permit lowering thereof to effect engagement of the file carried therebywith the teeth of a saw being filed, said means comprising a rigid arm secured to said connecting rod and a fixed cam plate, the relation being such that the outer end of said arm will engage said cam plate on the return stroke of the file, an.

anti-friction roller mounted in the end of said arm which engages 'sald cam plate,

and saw feeding means, substantially as dc scribed. V

-6. saw'filing machine of the type specified, the combination of saw supporting means, comprising a frame mounted on the mai -frame of the machine provided with slide bearings, a saw-carriage provided with bearings adapted to slidably engage the bearings on said frame, means for securing a saw in said saw-carriage, and saw feeding means, substantially as described.

7. In 'a saw filing machine of the type specified, the combination of saw supporting means, comprising a frame pivoted upon the main frame of the machine provided with slide bearings, a saw-carriage provided with bearings adapted to slidably engage the bearings on the frame of said saw supporting means, means for securing a saw in said'saw-carriage, means for securing said frame in different pivotal positions, and saw feeding means, substantially as described.

8. In a saw filing machine of the type specified, the combination of saw supporting means, comprising a frame mounted'on the main frame of the machine provided with slide bearings, a saw-carriage comprising jaws between which a saw is adapted to be clamped, said saw-carriage being provided with bearings adapted to engage the slide bearings on the frame of said saw supporting means, and saw feeding means, sub stantially as described.

9. In a saw filing-machine of the type specified, the combination of saw supporting means, comprising a frame mounted on the main frame of the machine provided with slide bearings, a saw-carriage comprising jaws between which a saw is adapted to be clamped, a rest bar for the rear edge of the saw, said saw-carriage being provided with bearings adapted to engage the slide hearings on the frame of said saw supporting means, and saw feeding means, substantially as described. 7

10. In a saw filing machine of the type specified, the combination of saw supporting means, comprising a frame mounted on the main frame of the machine provided with slide bearings, a saw-carriage com prising jaws between which a saw is adapted to be clamped, a pivoted rest bar for the rear edge of the saw, said saw-carriage being provided with bearings adapted to engage the slide bearings on the frame of said saw supporting means, and. saw feeding means, substantially as described.

11. In a saw filing machine of the type specified, the combination of saw supporting means, comprising a frame mounted on the main frame of the machine provided with slide bearings, a saw-carriage comprising jaws between which a saw is adapted to be clamped, a pivoted and vertically adjustable rest bar for the rear edge of the saw, said saw-carriage being provided with bearings adaptedto engage the slide bearings on the frame of said saw supporting 7 means, and saw feeding means, substantially as described.

12. In a saw filing machine of the type specified, the combination of saw supporting means, comprising a frame mounted on the main frame of the machine provided with slide bearings, a saw-carriage comprising spring jaws between which a saw is adapted to be clamped, a rest bar for the rear edgeof the saw, said saw-carriage being provided with bearings adapted to en gage the slide hearings on the frame of said saw supporting means, and saw feeding means, substantially as described.

13. In a saw filing machine of the type specified, the combination of saw supporting means, comprising a frame mounted on the main frame of the machine provided with slide bearings, a saw-carriage comprising jaws between which a saw is adapted to be clamped, said saw-carriage being provided with bearings on its opposite sides each adapted to slidably engage the slide bearings on the frame of said saw-supporting means, thereby providing for reversing the position of the saw-carriage and saw in the machine, and saw feeding means adapt ed for feeding said saw in either position, substantially as described.

14. In a saw filing machine of the type specified, the combination of saw support ing means, comprising a frame mounted on the main frame of the machine provided with slide bearings, a saw-carriage comprising jaws between which a saw is adapted to be clamped, arms secured to one of said clamping jaws, a bar secured to said arms, bearings formed on said clamping jaw and bar adapted to engage the slide hearings on the frame of said saw supporting means, and saw feeding means, substantially as described.

15. In a saw filing machine of the type specified, the combination of saw supporting means, comprising a framemounted on the main frame of the machine provided with slide bearings, a saw-carriage comprising 7 jaws between which a saw is adapted to be clamped, arms secured to said clamping jaws, bars secured to said arms, bearings formed on said jaws and on the bars connected thereto, respectively adapted to engage the slide bearings on the frame of the saw supporting means, whereby said saw may be inserted into the machine in reversed positions, and saw feeding means adapted for feeding the same in either position, substantially as described 16. In a saw filing machine of the type specified, the combination of saw supporting means, comprising a frame mounted on the main frame of the machine provided with slide bearings, a saw-carriage comprising spring jaws between which a saw is adapted to be clamped, said saw-carriage being provided with bearings adapted to engage the slide bearings on the frame of said saw supporting means, means for spreading said spring clamping jaws apart, and saw feeding means, substantially as described.

17. In a saw filing machine of the type' specified,the combination of a main frame, comprising saw supporting means, file supporting and actuating means, an operating shaft, and saw feeding means comprising pivoted levers, a link which connects said levers, pawls pivoted to said levers and adapted to engage the teeth of a saw supported in the machine, and connection between said levers and the operating shaft adapted for imparting oscillating movement to said levers, substantially as described.

18. In a saw filing machine of the type specified, the combination of a main frame, comprising saw supporting means, file supporting and actuating means, an operating shaft, and saw feeding means comprising pivoted levers, a link which connects said levers at opposite sides of their pivots, pawls pivoted to said levers and adapted to engage the teeth of a saw supported in the machine, and connection between said levers and the operating shaft adapted for imparting oscillating movement to said levers, substantially as described.

19. In a saw filing machine of the type specified, the combination of a main frame comprising saw supporting means, file supporting and actuating means, an operating shaft, and saw feeding means comprising a pivoted lever, a pawl pivoted to said lever and adapted to engage the teeth of a saw supported in the machine, and connection between said lever and the operating shaft adapted for imparting oscillating movement to said lever, said connection comprising a plate fitted to and movable endwise in guide hearings on the machine frame, a crank on the operating shaft, a connecting rod which connects said slide with said crank, said plate being provided with a slot which extends diagonally to the direction of movement of said slide with which the lower end of said lever engages, substantially as described.

20. In a saw filing machine of the type specified, the combination of a main frame comprising saw supporting means, file supporting and actuating means, an operating shaft, and saw feeding means comprising a pivoted lever, a pawl pivoted to said lever and adapted to engage the teeth of a saw supported in the machine, and connection between'said lever and the operating shaft adapted for imparting oscillating movement to said lever, said connection comprising a plate fitted to and movable endwise in guide bearings on the machine frame, a crank on the operating shaft, a angles to the direction of movement of said connecting rod which connects said slide 7 slide plate with which the lower end of said 10 with said crank,- said plate being provided lever also engages, substantially as de- With aslot which extends diagonally to the scribed. V 7 direction of movement of said slide with In testimony that I claim the foregoing which the lower end of saidlever engages, as my invention, I aiiix my signature this and a fixed plate beneath said slide plate 10th day ofNovember, 1919.

I r 1 WILLIAM DIEGELA p 'ovided with a slot which extends at right- 

